Principles of metal coloring, by W. J. Kaup.--Coloring iron and steel, by E. F. Lake.--Coloring non-ferrous metals and alloys, by E. F. Lake.--Lathe burnishing of metals, by W. A. Painter.--The ball burnishing process, by C. L. Lucas
Evidence reported by ian white for item metalcoloringfin00kauprich on February 2, 2007: visible notice of copyright; stated date is 1914.